Regex processor ignores namepass filter

[sgtsquiggs]

Relevant telegraf.conf:

[[inputs.tail]]
  files = ["test.log"]
  from_beginning = false
  data_format = "influx"
[[processors.regex]]
  namepass = "notalert"
  [[processors.regex.tags]]
    key = "source"
    pattern = "^.*/.*/([\\d]+)$"
    replacement = "${1}"
    result_key = "instance"

System info:

RHEL Linux 4.4.75-el6.x86_64.lime.1
Telegraf 1.9.2

Steps to reproduce:

Using log data generator:

#!/bin/bash

rm -f test.log
while [ 1 ]
do
	num=$(( ( RANDOM % 100 )  + 1 ))
	echo 'alert,host=localhost,severity=INFO,source=blah/test/'$num',type=1 data="blah blah blah" '$(date +%s%N) >> test.log
	sleep 1
done

use telegraf config above

Expected behavior:

lines from inputs.tail with metric name alert should not have the instance tag added by the processor regex which has namepass=notalert

Actual behavior:

all output entries have instance tag regardless of metric name

Additional info:

test.log:

alert,host=localhost,severity=INFO,source=blah/test/94,type=1 data="blah blah blah" 1548182801985227789
alert,host=localhost,severity=INFO,source=blah/test/31,type=1 data="blah blah blah" 1548182802987834242
alert,host=localhost,severity=INFO,source=blah/test/97,type=1 data="blah blah blah" 1548182803989886698
alert,host=localhost,severity=INFO,source=blah/test/78,type=1 data="blah blah blah" 1548182804991547174

telegraf stdout:

2019-01-22T18:46:49Z I! Starting Telegraf 1.9.2
2019-01-22T18:46:49Z I! Loaded inputs: inputs.tail
2019-01-22T18:46:49Z I! Loaded aggregators: 
2019-01-22T18:46:49Z I! Loaded processors: regex
2019-01-22T18:46:49Z I! Loaded outputs: file
2019-01-22T18:46:49Z I! Tags enabled: host=localhost
2019-01-22T18:46:49Z I! [agent] Config: Interval:10s, Quiet:false, Hostname:"localhost", Flush Interval:600ms
alert,host=localhost,instance=94,path=test.log,severity=INFO,source=blah/test/94,type=1 data="blah blah blah" 1548182801985227789
alert,host=localhost,instance=31,path=test.log,severity=INFO,source=blah/test/31,type=1 data="blah blah blah" 1548182802987834242
alert,host=localhost,instance=97,path=test.log,severity=INFO,source=blah/test/97,type=1 data="blah blah blah" 1548182803989886698
alert,host=localhost,instance=78,path=test.log,severity=INFO,source=blah/test/78,type=1 data="blah blah blah" 1548182804991547174

[sgtsquiggs]

Nevermind. After debugging it looks like nampass expects an array.

[danielnelson]

Sorry about this, I think the lack of error is related to #3444